Miniature variable optical attenuator

Details Miniature variable optical attenuator Miniature variable optical attenuator

1998-03-04

2000-10-10

Lee, John D.

Optical waveguides

Accessories

Attenuator

385 47, G02B 632, G02B 2600

Patent

active

061309842

ABSTRACT:
A variable optical attenuator controllably filters an optical signal after the signal has been expanded and collimated. The optical signals are optionally expanded and refocused by a single GRIN lens, the signal passing through a variable filter between the GRIN lens and a reflector, and again between the reflector and the GRIN lens. Both the input and output fibers can be held within a single sleeve in alignment with the GRIN lens. Alternatively, separate input and output GRIN lenses may be used. The amount of attenuation can be indicated by a potentiometer.

REFERENCES:
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patent: 5781341 (1998-07-01), Lee
patent: 5799121 (1998-08-01), Duck et al.
patent: 5889904 (1999-03-01), Pan et al.
patent: 5900983 (1999-05-01), Ford et al.
patent: 5999669 (1999-12-01), Pan et al.

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